html, body, #app {
  margin: 0;
  width: 100%;
  height: 100%;
  color: #333;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  font-size: 10px;
}
body {
  margin: 0 auto;
  width: 100%;
  background: #f4f4f4;;
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto,
    Helvetica Neue, Arial, Noto Sans, sans-serif, Apple Color Emoji,
    Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji; 
}